In the following expression which terms can be combined? 64 - 82g + 24 1) 64 + 24 2) 64 - 82g 3) -82g + 24 4) none of the above

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236